More About Stamped Steel 4-Way Registers, 1/2 Inch Spacing (684 Series)
The 684 Series Stamped Steel 4-Way Registers for sidewall or ceiling application by Hart & Cooley are made with all-steel construction and are ideal for shallow duct installations. They have 1/2" spaced fins set at 40 degrees, a multi-shutter valve, 1-5/8" depth when fully opened, interlocking valve louvers for positive shut-off, and come with a bright white finish.
Listed heights 10” and larger require double valves